Brake-shoe mold



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Feb. 19 1924.

J. s. THOMPSON BRAKE sHoE MoLb iled July 2o. 1923 2 Sheets-Sheet 1 Feb. 19, 1924. www2? J. s. THOMPSQN BRAKE SHOE MOLD Y Filed July 20, 1923 2 Sheets-Shea?. 2

`Pateluted Feb. i9, lgl.

BRAKE-SHOE MOLD.

Application filed July 20, 1923.

T o all whom t may concern Be it known that I, JAMES S. THOMPSON, a citizen of the United States, residing at Pelham, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Brakeshoe Molds, of which the following is a specification.

rlhis invention relates to the manufacture of brake shoes, and more particularly to the mold in which the shoe is cast, and its object is broadly to enable a brake shoe to be cast in a permanent mold fully as well as it can be cast in a sand mold and with the additional advantages of reduction in time and labor.

A further object of' the invention is to provide a mold which'can be easily and quickly opened and closed to permit insertion ot' any parts which are to be embedded in the shoe casting, and to permit removal of the shoe.

And a further object of the invention is to make the cope of the mold in two members, hinged to swing oppositely and each having a portion of the mold cavity therein, with means for supporting parts to be inserted in the shoe casting in that portion of the mold cavity which is located in one cope member so that the other cope member may be closed without injuring or disarranging said parts.

My invention also has other objects in view which will be pointed out hereafter in the detailed description thereof by reference to the accompanying drawings, which show a selected embodiment of the invention, and referring to which* Fig. l is a transverse sectional view on the line 1-1 of Fig. 2.

Fig. 2 is a longitudinal view partly in elevation and partly in section.

Fig. 3 is a horizontal sectional view on the line 3 3 of Fig. 2.

Fig. et is a perspective view showing a portion of the drag in section and a portion of one member of the cope in elevation.

Fig. 5 is a fragmentary view partly in section of the refractory material which forms the mold cavity wall in one member or' the cope.

Fig. 6 is a detail perspective view of the core for forming the opening in the attach.- infr lug.

eterring to the drawings, the mold com- Serial No. 652,775.

prises a drag member 7 and two cope members 8 and 9 having a mold cavity/'10 therein. The drag member is relatively fixed and is provided with outstanding side lugs 11 with which the outstanding side lugs 12 on the cope members are pivotally engaged by the pivot bars 13. rilhe mold cavity is formed partly in one cope member and partly in the other cope member, the parting line between said members extending longitudinally of the mold and substantially central of the mold cavity. This construction provides a simple means for opening and closing the mold and it also enables the parts to be embedded in the shoe casting t0 be arranged in the mold and held therein securely for proper positioning in the shoe casting. It is important also to make provision for closing the cope members without injury to and without disarranging the parts to be embedded in the shoe casting, and also to enable the cope members-to be opened for the removal of the shoe casting without damage to any parts of the mold.

I have accomplished these desirable results in a very simple manner in this invention whereby brake shoes can be made in permanent molds as well as they can be made in sand molds, and even with greater perfection, and at a greater speed and less cost.

lt is customary to embed a steel attaching lug 14 and a steel reinforcing back 15 in the shoe casting, and it is also customary to provide a sand core 16 for forming the opening in the attaching lug. A recess 1'? in the two members or" the cope forms a part of the mold cavity and accommodates the attaching lug 14 and the sand core 16, and since this sand core and attaching lug will be supported partly in one cope member and partly in the other, it will be necessary to construct the walls ot the recess and the sand core in such a manner that the cope members can be closed without damage to the core. I preferably construct that part of the recess in one core member and that part of the core which fits therein in a manner to hold and support the core while the members are being closed, and during the casting operation, and 1 make that part of the recess in the other core member and the corresponding part of the core so that said other-core member can be opened or closed after its companion the partsassociated therewith. I willrefer for convenience to the core member 8 asthe vleft' member and to the core member 9 as the right member and describe the construction thereof as shown in the drawings, it being understood that these parts may be reversed if found desirable. The left core member 8 has its half of the recess 7 provided with endientensions 18 having inclined end walls 19, Fig. 4, to receive the extensions 20 having inclined faces 21 atthe ends of the core l6,-Fig. 6. lt will be noted that these extensions 2O .are located at the top and on one side only ofthe core and they may befsaid 'to represent, `for purposes of deseriptiomone upper corner of each end of the'core. The reinforcing backis preferably :fastened to the core .by wire ties 22, and when theattaching lug, the coreand the reinforcing back are assembled as a unit, they can `be .easily inserted 'sidewise into that part of the mold cavity in; the left core member 8 when Ythe `latter is in open position, as shown in broken lines in Fig. 1, after `which this leftcore member can-be swung to closedposition without dislo'dging or disarranging said unit, and thenfthexright core member -9 can 4be closed without dislodging or disarranging said unit, which is then positioned and held in the cavity tolbe properly embedded in theshoe casting. In order that the right core member 9 may be closed withoutinjury to the core 16, prefer to make the upper part 23 of each end'wall in thatspart of the recess formed therein inclined reversely to the adjacent inclined -end wall 19 on the left member, and also toV reversely inclinethe adjacent upper quarter 24: of the end of the coreto the inclination of the adjacent quarter 21, so that theeffect is to cutaway theupper corners of that portion of the core which enters that portion of the recess located in the right cope member. The core is made to fit in the recess in the left cope member, and therecess-in the right cope member isA made tofit on that portion ofthe core with which it engages, and the construction is such that the core be inserted in the leftcope member 8 when the latter is in open position, and this left cope member can then be closed without dislodging or disarranging the core, after which the right cope member 9 may be closed without damaging or disarranging the core. This is an important feature of my invention because it enables the mold-to be loaded, so to speak, andV prepared forxthe casting operation, and also enables the casting operation to be performed, without in any way damaging or disarrangingthe load, so that the parteV to be embeddedV in the slice will be-properly disposed'and embedded-therein, and it also enables the mold to be opened easily and the casting removed without damage to any `in which the mold cavity is faced with refractory material 25 throughout topreventv lthe metal of the mold members from chilling the casting, as shown in the drawings, or the refractory material may be applied in sections in any desired manner to permit the shoe casting to be chilled at certain parts. `My invention provides a mold of simple, compact, convenient and substantial construction which canbe easily and quickly operated for .the production of a brake shoe. When thecopefmembers `are thrown to open position for yremoval 1of `the `shoel casting, they are at the same time positioned vfor the reception ofthe parts to be embedded. in the casting, andthis canbe easily done and the vmold closed 4again without the exercise of special skill or vany considerable amount of labor. ,l provide one or more clamps 26 for holding the two members of the cope in closed position, `and this also holds the two members rigid with the drag member. I also provide one or more ksand plugs 27 in thecope to permit the escape of gases from the mold cavity.

My invention can be employed for making castings other than brake shoes, and I consider myself entitled to make 1allgsuch changes in the form, construction and arrangement of parts as may 1oe-necessary or desirable for this purpose, and for making different kinds, shapes and sizes of brake ice shoes, which 'fairly fall within the scope of the following claims.

l claim- LA permanent mold for making cast ings, comprising ta drag Vand a two-member cope having a mold cavityl therein, said cope members being hinged on the drag member to swing outwardly thereon, each of said cope members having apart of the mold cavity therein and adapted to accommodate a portion of the parts which are to be embedded in the casting, and means for hol d ing said parts in one copemember and for permitting the other cope member to be swung to closed position `Vwithout disarranging1 said parts. f f

2. A permanent vmold for making castings, comprising a drag and atwoanember cope having a mold cavity therein, said cope members being hinged on the dran member to swing outwardly thereon, each of said cope members having a part of the mold cavity therein and adapted to accommodate a portion of the Vparts which are to be embedded in the casting, said cope member being adapted to reccivesaid parts while it islin O penposition, and means for holding said parts in said cope member while it isbeing swung from open to closed position lit) insee-ev and While the other cope member is being closed.

3. A permanent mold 'for making castings, comprising a drag and a two-member cope having a mold cavity therein, said cope members being hinged on the drag member to swing outi-,vardly thereon, each of said cope members having a part of the mold cavity therein and adapted to accommodate a portion of the parts Which are to be embedded in the casting, and means in one cope member for holding said parts therein While the mold is being closed and during the casting operation.

d. A. permanent mold for casting a brake shoe, comprising a drag and a tivo-member cope,having a. mold cavity therein, said cope members being hinged on the drag member to swing outwardly thereon, each oi said f c/ope members having substantially a longi-Y tudinal one half of the mold cavity t ierein and adapted to accommodate a corresponding portion or the parte which are tol be em,- bedded in the shoe casting and including'the core for forming the opening in the attaching lug, and means for holding said parts in one cope member during the closing ot the mold and during the casting operation and `for permitting the other cope member to be freely opened and closed Without atlecting said parts.

5. A permanent mold casting a brake shoe, comprising a drag `ember and a. tivomember cope having a mold cavity therein, said cope members being hinged on the drag member to swing outwardly thereon, each of said cope members having substantially a longitudinal one half of the mold cavity therein and adapted to accommodate a corresponding portion of the parts Which are to be embedded in the shoe casting and including the core for forming the opening in the attaching lug, and means cooperating with said core to hold and support said parts in one cope member While the mold is being closed and during the casting opera tion and Without interfering with the clos ing` or opening of the other cope member.

6. A permanent mold for casting a bralre shoe, comprising a drag and a tivo-memberV cope having mold cavity therein, said cope members being hinged on the drag member to swing outwardly thereon, each of said cope members having a part of the mold cavity therein and adapted to accommodate a corresponding portion of the parts Which are to be embedded in the slice casting and including the core for forming the opening in the attaching lng, and shoulders inthe Walls or that portion of the cavity in one cope member to cooperate with shoulders on said core for holding and supporting said parts in said cope member While the mold is being` `closed and during the casting operation.

7. ylhe combination With a core for ferire ing the opening in the attaching lug or" a brake shoe and having an extension thereon, of a permanent mold for casting the brake shoe and comprising a drag and a tivo-memer cope havino` a mold cavity therein, said cope members being hinged on the drag member to swing outwardly thereon, each oi" said cope members having a part of the mold cavity therein and adapted to accommodate a portion ot sait. core and one ot' sain members having that part or" the mold cavity therein i'ormedto accommodate the extension on the core, substantially as and for the purpose described.

8. The combination with a core for forming the opening in the attaching lug of a brake shoe and having a corner extension thereon. of a permanent mold for casting the brake shoe and comprising a drag 4and a two-member cope having a mold cavity therein` said cope members being hinged on the member to string outwardly thereon, each ot said cope members having a part oi the mold cavity therein and adapted to accommodate a portion of said core and one of said members having that portion of the mold cavity therein formed to accommodate the corner extension on the core, substantially as and for the purpose described.

9. rlhe combination with a core for forming the attaching lug in a bralre shoe and having corner extensions atits ends, of a permanent mold for casting the brake shoe and comprising a drag and a t-Wo-1nember cope having a mold cavity therein, said cope members being hinged on the drag member to swing outwardly thereon, each of said cope members having a part of the mold cavity therein and adapted to accommodate a portion of said coreand one of said mem` bers having that part of the mold cavity therein provided with extensions to accommodate the corner extensions on the ends ot the core, substantially as and for the purpose described.

l0. The combination with a core for orming the opening in the attaching lug of a bralre shoe and having corner extensions thereon with inclined faces, of a permanent mold for casting the brake shoe. and comprising a drag and a two-member cope having a mold cavity therein, said cope members being hinged on the dragr member to swing outwardly thereon, each ot said cope members having a part of the mold cavity therein and adapted to accommodate a portion of said core and one of said members having that part of the mold cavity therein formed with extensions and inclined Walls to accommodate the extensions on the core, substantially as and for the purpose described.

l1. The combination with a core for torming the opening in the attaching lug of a mit brake shoe and having' Cornel* end extensiens thereon with inclined faces, adjacent Corne-rs at the top of the core being reveisely indined, of a. permanent mold 'foieesting the brake shoe and comprising a (img and `a two-member cope having a meld cavity therein, said Cope members beinghinged on the dra-g member to swing outwazdly thereon, each of said cope members having e part f of the mold cavity therein shaped to fitV that mame? part of the core which is Seated th ein,snb siantieiy as sind for the purpose described.

lf2. @one for femmine i-ne opening in the atieebing iugin 'tbe mannaetiie Die brake Shoe/,end having at. eaehend one iippei crner extended and provided with an inclined fece and its other upper cernerrrevesely inclined.

JAMES e. meeneem; 

